WO2016155180A1

WO2016155180A1 - Display panel and display device

Info

Publication number: WO2016155180A1
Application number: PCT/CN2015/086246
Authority: WO
Inventors: 朴求铉
Original assignee: 京东方科技集团股份有限公司; 合肥京东方光电科技有限公司
Priority date: 2015-04-01
Filing date: 2015-08-06
Publication date: 2016-10-06
Also published as: CN104730758A; EP3279719A4; US20170038638A1; EP3279719A1; US10139670B2

Abstract

A display panel comprises a first light polarization layer (201), a display substrate (202), a second light polarization layer (203) and a phase difference membrane (204), wherein the first light polarization layer (201) is arranged on a side of the display substrate (202) and also between the second light polarization layer (203) and the display substrate (202), the transmission axis direction of the first light polarization layer (201) is perpendicular to that of the second light polarization layer (203), and the phase difference membrane (204) is arranged between the first light polarization layer (201) and the second light polarization layer (203). On the basis of existing display panels, the second light polarization layer (203) and the phase difference membrane (204) are arranged, so that only linearly polarized light having a polarization direction parallel to the transmission axis direction of the second light polarization layer (203) can be emitted from the display panel. As a result, a user with the angle of view perpendicular to the display panel can see the content in the display panel, while a user with the angle of view towards other directions cannot see the content in the display panel, and therefore the privacy of the users is effectively protected.

Description

Display panel and display device

Technical field

The present invention relates to the field of display technologies, and in particular, to a display panel and a display device.

Background technique

With the development of display technology, various displays have been widely used in daily life, for example, a smartphone having a display screen, a tablet computer, an MP3 (Moving Picture Experts Group Audio Layer III), and the like. Currently, there are two main types of display panels for mainstream displays, one is a liquid crystal display panel, and the other is an OLED (Organic Light-Emitting Diode) display panel.

Taking the LCD display panel as an example, the display mode of the existing LCD display panel is generally TN (Twisted Nematic) mode. Referring to FIG. 1, the display panel is composed of an upper polarizing layer 101, a lower polarizing layer 102, and a liquid crystal display substrate 103. The upper polarizing layer 101 and the lower polarizing layer 102 are located on both sides of the liquid crystal display substrate 103, and the transmission axis directions of the upper polarizing layer 101 and the lower polarizing layer 102 are perpendicular to each other. When incident light enters the display panel through the lower polarizing layer 102, a light component of the incident light parallel to the transmission axis direction of the second polarizing layer 102 may pass through the lower polarizing layer 102. Since the liquid crystal molecules are arranged in a spiral arrangement, the angle between the underlying liquid crystal molecules and the top liquid crystal molecules is 90 degrees, and when the light component passing through the second polarizing layer 102 is incident on the liquid crystal display substrate, the polarization direction of the light component is rotated. 90 degrees, that is, the polarization direction after the rotation of the light component is parallel to the transmission axis direction of the upper polarizing layer 101. At this time, all the light components can pass through the upper polarizing layer 101, and the display mode of the display panel is a wide viewing angle.

In the process of implementing the present invention, the inventors have found that the related art has at least the following problems:

When the display mode of the display panel is the wide viewing angle mode, when the user uses a device with a display screen such as a smartphone or a tablet in public, the surrounding users may view the content on the display screen of the device, causing the privacy of the user to be leaked. .

Summary of the invention

In order to solve the problems of the related art, embodiments of the present invention provide a display panel and a display device. The technical solutions are as follows:

In one aspect, a display panel is provided, the display panel comprising: a first polarizing layer, a display substrate, a second polarizing layer, and a retardation film;

The first polarizing layer is disposed on one side of the display substrate, and the first polarizing layer is disposed between the second polarizing layer and the display substrate, and a transmission axis direction of the first polarizing layer is The transmission axis directions of the second polarizing layer are perpendicular to each other;

The retardation film is disposed between the first polarizing layer and the second polarizing layer.

With reference to the first aspect, in a first possible implementation manner of the first aspect, the display substrate is a liquid crystal display substrate, and the display mode of the liquid crystal display substrate is an ADS mode (advanced super-dimensional field conversion mode) or a TN mode. (twisted nematic mode).

In conjunction with the first possible implementation of the first aspect, in a second possible implementation manner of the first aspect, the display panel further includes a third polarizing layer;

The first polarizing layer is disposed on a light emitting side of the display substrate, and the second polarizing layer is disposed on a light emitting side of the first polarizing layer;

The third polarizing layer is disposed on a light incident side of the display substrate, and a transmission axis direction of the third polarizing layer and a transmission axis direction of the first polarizing layer are perpendicular to each other.

In conjunction with the first possible implementation of the first aspect, in a third possible implementation manner of the first aspect, the display panel further includes a third polarizing layer;

The first polarizing layer is disposed on a light incident side of the display substrate, and the second polarizing layer is disposed on a light incident side of the first polarizing layer;

The third polarizing layer is disposed on a light emitting side of the display substrate, and a transmission axis direction of the third polarizing layer and a transmission axis direction of the first polarizing layer are perpendicular to each other.

In conjunction with the first aspect, in a fourth possible implementation manner of the first aspect, the display substrate is an OLED display substrate.

In conjunction with the fourth possible implementation of the first aspect, in a fifth possible implementation manner of the first aspect, the first polarizing layer is disposed on a light emitting side of the display substrate, and the second polarizing layer is disposed On the light exiting side of the first polarizing layer.

In conjunction with the second possible implementation of the first aspect, or the fifth possible implementation of the first aspect, in a sixth possible implementation manner of the first aspect, the display panel further includes an optical substrate;

The optical substrate is disposed on a light exiting side of the second polarizing layer or between a light emitting side of the first polarizing layer and the retardation film.

In conjunction with the third possible implementation of the first aspect, in a seventh possible implementation manner of the first aspect, the display panel further includes an optical substrate;

The optical substrate is disposed on a light exiting side of the third polarizing layer.

In conjunction with the sixth possible implementation of the first aspect or the seventh possible implementation of the first aspect, in an eighth possible implementation of the first aspect, the optical substrate is a touch pad or a cover glass.

In conjunction with the first aspect, in a ninth possible implementation of the first aspect, the retardation film is a uniaxial retardation film.

In conjunction with the first aspect, in a tenth possible implementation of the first aspect, the retardation film has a thickness of 90 nm to 320 nm.

In a second aspect, there is provided a display device comprising the display panel of the first aspect described above.

The beneficial effects brought by the technical solutions provided by the embodiments of the present invention are:

On the basis of the conventional display panel, the second polarizing layer and the retardation film are disposed such that the linearly polarized light whose polarization direction is parallel to the transmission axis direction of the second polarizing layer can be emitted from the display panel, and therefore, the viewing angle is perpendicular to The user of the display panel can view the content in the display panel, while the user with the other direction of view can not view the content in the display panel, thereby effectively protecting the privacy of the user.

DRAWINGS

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly described below. It is obvious that the drawings in the following description are only some embodiments of the present invention. Other drawings may also be obtained from those of ordinary skill in the art in light of the inventive work.

1 is a schematic structural view of a conventional display panel;

FIG. 2(A) is a schematic structural diagram of a display panel according to an embodiment of the present invention;

2(B) is a schematic structural view of a display panel according to another embodiment of the present invention;

3 is a schematic structural diagram of a display panel according to another embodiment of the present invention;

4 is a schematic structural diagram of a display panel according to another embodiment of the present invention;

FIG. 5 is a schematic structural diagram of a display panel according to another embodiment of the present invention; FIG.

FIG. 6 is a schematic structural diagram of a display panel according to another embodiment of the present invention; FIG.

7 is a perspective view of a conventional display panel;

FIG. 8(A) is a perspective view of a display panel according to an embodiment of the present invention;

FIG. 8(B) is a perspective view of a display panel according to an embodiment of the present invention;

FIG. 9 is a schematic structural diagram of a display panel according to another embodiment of the present invention; FIG.

FIG. 10 is a schematic structural diagram of a display panel according to another embodiment of the present invention; FIG.

11 is a schematic structural diagram of a display panel according to another embodiment of the present invention;

FIG. 12 is a schematic structural diagram of a display panel according to another embodiment of the present invention; FIG.

FIG. 13 is a schematic structural diagram of a display panel according to another embodiment of the present invention; FIG.

FIG. 14 is a schematic structural diagram of a display panel according to another embodiment of the present invention.

detailed description

The embodiments of the present invention will be further described in detail below with reference to the accompanying drawings.

With the development of information technology, information security has become a matter of great concern to users. The existing display panel usually has a polarizing layer on the display substrate side. When the incident light passes through the polarizing layer, the incident light in all directions can be emitted from the polarizing layer, and the display panel operates in a wide viewing angle mode. Not well protected.

In order to solve the above technical problem, an embodiment of the present invention provides a display panel. As shown in FIGS. 2(A) and 2(B), the display panel includes a first polarizing layer 201, a display substrate 202, a second polarizing layer 203, and a retardation film 204.

The first polarizing layer 201 is disposed on one side of the display substrate 202, and the first polarizing layer 201 is disposed between the second polarizing layer 203 and the display substrate 202, and the transmission axis direction of the first polarizing layer 201 and the second polarizing layer. The transmission axis directions of 203 are perpendicular to each other; the phase difference film 204 is disposed between the first polarizing layer 201 and the second polarizing layer 203.

In the display field, the display substrate generally has two sides, which are the light incident side and the light exit side, and the first polarizing layer 201 may be disposed on the light incident side of the display substrate 202 or on the light exit side of the display substrate 202. The structure of the display panel provided by this embodiment is also different for different positional relationships between the first polarizing layer 201 and the display substrate 202.

In one embodiment of the present invention, as shown in FIG. 2(A), the first polarizing layer 201 is disposed on the light emitting side of the display substrate 202, and the second polarizing layer 203 is disposed on the light emitting side of the first polarizing layer 201, and the phase difference is The diaphragm 204 is disposed between the light exiting side of the first polarizing layer 201 and the light incident side of the second polarizing layer 203.

In another embodiment of the present invention, as shown in FIG. 2(B), the first polarizing layer 201 is disposed on the light incident side of the display substrate 202, and the second polarizing layer 203 is disposed on the light incident side of the first polarizing layer 201. The retardation film 204 is disposed on the light incident side and the second bias of the first polarizing layer 201 Between the light exit sides of the light layer 203.

According to the display panel provided by the embodiment of the present invention, the second polarizing layer and the retardation film are disposed on the basis of the existing display panel, so that the linearly polarized light whose polarization direction is parallel to the transmission axis direction of the second polarizing layer can be displayed. Shot in the panel. Therefore, the user whose viewing angle is perpendicular to the display panel can view the content in the display panel, and the user whose viewing angle is in other directions cannot view the content in the display panel, thereby effectively protecting the privacy of the user.

As shown in FIG. 2(A), an embodiment of the present invention provides a display panel including a first polarizing layer 201, a display substrate 202, a second polarizing layer 203, and a retardation film 204. In this embodiment, the display substrate 202 is a liquid crystal display substrate as an example. The first polarizing layer 201 is disposed on the light emitting side of the liquid crystal display substrate 202, the second polarizing layer 203 is disposed on the light emitting side of the first polarizing layer 201, and the retardation film 204 is disposed on the light emitting side of the first polarizing layer 201 and Between the light incident sides of the second polarizing layer 203.

In the field of display, the polarizing layer usually consists of a polarizer. Since the polarizer has a transmission axis, only incident light having a polarization direction parallel to the transmission axis direction is allowed to be emitted. Therefore, when the incident light passes through the polarizing layer, if the polarization direction of the incident light is parallel to the transmission axis direction of the polarizing layer, the incident light may be All pass through the polarizing layer; if the polarization direction of the incident light is perpendicular to the transmission axis direction of the polarizing layer, the incident light cannot pass through the polarizing layer; if the polarization direction of the incident light forms a certain angle with the transmission axis direction of the polarizing layer, the incident light Part of the light component may pass through the polarizing layer, and the polarization direction of the partial light component is parallel to the transmission axis direction of the polarizing layer. In addition, the polarizing layer also has good absorption, scattering and reflection characteristics, and can hide the incident light that cannot be transmitted by absorption, scattering, reflection, etc., to control the display effect of the image.

In this embodiment, a plurality of polarizing layers are involved. In order to facilitate distinguishing the polarizing layers, the polarizing layer is divided into the first polarizing layer 201 and the second polarizing layer according to different positions of the polarizing layers in the display panel. Layer 203. In this embodiment, the transmission axis direction of the first polarizing layer 201 and the transmission axis direction of the second polarizing layer 203 are perpendicular to each other. When the angle between the transmission axis direction of the first polarizing layer 201 and the horizontal direction is 90 degrees, The angle between the transmission axis direction of the second polarizing layer 203 and the horizontal direction is 0 degrees; when the angle between the transmission axis direction of the first polarizing layer 201 and the horizontal direction is 0 degrees, the transmission axis direction and level of the second polarizing layer 203 The angle of the direction is 90 degrees.

In the present embodiment, a liquid crystal material having dielectric anisotropy and optical anisotropy in the liquid crystal display substrate 202, and a pixel electrode and a common electrode for generating an electric field to drive the liquid crystal material. The display mode of the liquid crystal display substrate may be an ADS mode, a TN mode, or the like. The TN mode is the most representative display mode in the current display field. In the TN mode, the liquid crystal molecules in the liquid crystal material are arranged in a spiral, and the angle between the underlying liquid crystal molecules and the top liquid crystal molecules is 90 degrees. The pixel electrode is connected to a TFT (Thin Film Transistor). The pixel electrode and the common electrode may be disposed vertically or horizontally to enable them to generate an electric field in a vertical or horizontal direction. When the pixel electrode and the common electrode are disposed on the substrate opposite to each other on both sides of the liquid crystal material, a vertical electric field can be generated; when the pixel electrode and the common electrode are disposed on the same substrate, a horizontal electric field can be generated.

In the present embodiment, the retardation film 204 is a uniaxial retardation film composed of a uniaxial birefringent crystal. The retardation film 204 has a thickness of 90 nm (nanometer) to 320 nm. In practical applications, the retardation film 204 is usually a quarter-wave plate or a half-wave plate. It is known from the properties of the uniaxial birefringent crystal in physics that the retardation film 204 can change the polarization direction of the incident light by changing the phase of the incident light. The phase difference of the uniaxial birefringent crystal retardation is:

Where Δφ is the phase difference of the uniaxial birefringent crystal retardation, λ is the wavelength of the incident light, n _o is the refractive index of the ordinary light, n _{e is} the refractive index of the extraordinary light, and d is the thickness of the uniaxial birefringent crystal.

Referring to FIG. 3, the display panel provided by the embodiment of the present invention may further include a third polarizing layer 205 whose transmission axis direction is perpendicular to the transmission axis direction of the first polarizing layer 201. When the angle between the transmission axis direction of the first polarizing layer 201 and the horizontal direction is 90 degrees, the angle between the transmission axis direction of the third polarizing layer and the horizontal direction is 0 degrees; when the transmission axis direction of the first polarizing layer 201 is When the angle in the horizontal direction is 0 degrees, the angle between the transmission axis direction of the third polarizing layer and the horizontal direction is 90 degrees. As shown in FIG. 3, the first polarizing layer 201 is disposed on the light emitting side of the liquid crystal display substrate 202, the second polarizing layer 203 is disposed on the light emitting side of the first polarizing layer 201, and the third polarizing layer 205 is disposed on the liquid crystal display substrate 202. On the side, at this time, the phase difference film 204 is disposed between the light outgoing side of the first polarizing layer 201 and the light incident side of the second polarizing layer 203.

4 is a narrow viewing angle mode shown in accordance with one embodiment of the present invention. Referring to FIG. 4, the angle between the transmission axis direction of the first polarizing layer 201 and the horizontal direction is 90 degrees, the angle between the transmission axis direction of the second polarizing layer 203 and the horizontal direction is 0 degrees, and the transmission of the third polarizing layer 205 Shaft side For example, the angle between the horizontal direction and the horizontal direction is 0 degree, and the phase difference film 204 is a quarter wave plate. When natural light is incident through the third polarizing layer 205 to the display panel as shown in FIG. 4, the natural light becomes the first linearly polarized light whose polarization direction is at an angle of 0 degrees with respect to the horizontal direction, and when passing through the liquid crystal display substrate 202, in the liquid crystal Under the action of molecules, the polarization direction of the first linearly polarized light is rotated by 90 degrees, and becomes a second linearly polarized light having an angle between the polarization direction and the horizontal direction of 90 degrees. When the second linearly polarized light passes through the phase difference film 204 And obtaining a third polarized light whose polarization direction is at an angle with the horizontal direction. When the third polarized light passes through the third polarizing layer 205, the polarization direction of the third polarized light is not parallel to the transmission axis direction of the third polarizing layer 205. Among the third polarized lights, only a light component whose polarization direction is parallel to the transmission axis direction of the third polarizing layer 205 may pass through the third polarizing layer. At this time, the display panel operates in a narrow viewing angle mode, and only the user whose viewing angle is perpendicular to the display panel can view the content in the display panel.

Based on the display panel shown in FIG. 3, the display panel provided by the embodiment of the present invention may further include an optical substrate 206, which has the functions of protecting the display panel from damage, increasing the transmittance of incident light, and the like. The optical substrate 206 can be a touch panel or a protective glass. The optical substrate 206 is not specifically limited in the embodiment of the present invention. Referring to FIG. 5, the optical substrate 206 may be disposed on the light exiting side of the second polarizing layer 203. Referring to FIG. 6 , the optical substrate 206 may also be disposed between the light exiting side of the first polarizing layer 201 and the retardation film 204 .

In addition, in order to control the luminance distribution on the display panel, the angle between the optical axis direction of the retardation film 204 and the horizontal direction may be selected as appropriate, for example, any angle from 0° to 45° may be selected.

7 is a perspective view of a conventional display panel, and FIGS. 8(A) and 8(B) are perspective views of a display panel according to an embodiment of the present invention. The viewing angle range of the display panel of the present invention is the area indicated by 1 in FIG. 7. The viewing angle range of the display panel provided by the embodiment of the present invention is the area indicated by 2 in FIG. 8(A) and 3 in FIG. 8(B). The area indicated. By comparing the viewing angle of the existing display panel with the viewing angle of the display panel provided by the embodiment of the present invention, it can be found that the viewing angle of the display panel is greatly reduced by using the display panel provided by the embodiment of the present invention.

According to the display panel provided by the embodiment of the present invention, the second polarizing layer and the retardation film are disposed on the basis of the existing display panel, so that the linearly polarized light whose polarization direction is parallel to the transmission axis direction of the second polarizing layer can be displayed. The panel is ejected. Therefore, the user whose viewing angle is perpendicular to the display panel can view the content in the display panel, and the user whose viewing angle is in other directions cannot view the content in the display panel, thereby effectively protecting the privacy of the user.

As shown in FIG. 2(B), an embodiment of the present invention provides a display panel, the display surface The board includes a first polarizing layer 201, a display substrate 202, a second polarizing layer 203, and a retardation film 204. In this embodiment, the display substrate 202 is a liquid crystal display substrate as an example. The first polarizing layer 201 is disposed on the light incident side of the display substrate 202, the second polarizing layer 203 is disposed on the light incident side of the first polarizing layer 201, and the retardation film 204 is disposed on the light incident side of the first polarizing layer 201. Between the light exiting side of the second polarizing layer 203.

In this embodiment, a plurality of polarizing layers are involved. In order to facilitate the distinction between the polarizing layers, the polarizing layer is divided into the first polarizing layer 201 and the second polarizing layer according to the position of each polarizing layer in the display panel. 203. In this embodiment, the transmission axis direction of the first polarizing layer 201 and the transmission axis direction of the second polarizing layer 203 are perpendicular to each other. When the angle between the transmission axis direction of the first polarizing layer 201 and the horizontal direction is 90 degrees, The angle between the transmission axis direction of the second polarizing layer 203 and the horizontal direction is 0 degrees; when the angle between the transmission axis direction of the first polarizing layer 201 and the horizontal direction is 0 degrees, the transmission axis direction and level of the second polarizing layer 203 The angle of the direction is 90 degrees.

Referring to FIG. 9 , the display panel provided by the embodiment of the present invention may further include a third polarizing layer 205 whose transmission axis direction is perpendicular to the transmission axis direction of the first polarizing layer 201 . When the angle between the transmission axis direction of the first polarizing layer 201 and the horizontal direction is 90 degrees, the angle between the transmission axis direction of the third polarizing layer and the horizontal direction is 0 degrees; when the transmission axis direction of the first polarizing layer 201 is When the angle in the horizontal direction is 0 degrees, the angle between the transmission axis direction of the third polarizing layer and the horizontal direction is 90 degrees. As shown in FIG. 9 , the first polarizing layer 201 is disposed on the light incident side of the liquid crystal display substrate 202 , the second polarizing layer 203 is disposed on the light incident side of the first polarizing layer 201 , and the third polarizing layer 205 is disposed on the liquid crystal display substrate 202 . At the light exiting side, the retardation film 204 is disposed between the light incident side of the first polarizing layer 201 and the light emitting side of the second polarizing layer 203.

Figure 10 illustrates a narrow viewing angle mode in accordance with one embodiment of the present invention. Referring to FIG. 10, the angle between the transmission axis direction of the first polarizing layer 201 and the horizontal direction is 0 degrees, the angle between the transmission axis direction of the second polarizing layer 203 and the horizontal direction is 90 degrees, and the transmission of the third polarizing layer 205 The angle between the axial direction and the horizontal direction is 90 degrees, and the phase difference diaphragm 204 is a quarter-wave plate. When natural light is incident through the second polarizing layer 203 to the display panel as shown in FIG. 10, the natural light becomes the first linearly polarized light whose polarization direction is at an angle of 90 degrees with respect to the horizontal direction, when the first linearly polarized light passes through the retardation film. After the sheet 204, the polarization direction of the first linearly polarized light will change, and a second polarized light whose polarization direction is at an angle with the horizontal direction is obtained. After the second polarized light passes through the first polarizing layer 201, the second polarized light is Only a light component whose polarization direction is parallel to the transmission axis direction of the first polarizing layer 201 may pass through the first polarizing layer 201 if it will pass The light component of the first polarizing layer 201 is referred to as a third polarized light, and the angle of polarization of the third polarized light with the horizontal direction is 0 degrees. When the third polarized light passes through the liquid crystal display substrate 202, the role of the liquid crystal molecules Next, the polarization direction of the third polarized light is rotated by 90 degrees to obtain a fourth polarized light, and the angle of polarization of the fourth polarized light with the horizontal direction is 90 degrees. When the fourth polarized light passes through the third polarizing layer 205, the polarization direction of the fourth polarized light is parallel to the transmission axis direction of the third polarizing layer 205, and may pass through the third polarizing layer 205, and the display panel operates in a narrow viewing angle mode. Only the user whose viewing angle is perpendicular to the display panel can view the content in the display panel.

The display panel provided by the embodiment of the present invention may further include an optical substrate 206 having the functions of protecting the display panel from damage, increasing the transmittance of incident light, and the like. The optical substrate 206 can be a touch panel or a protective glass. The optical substrate 206 is not specifically limited in the embodiment of the present invention. Referring to FIG. 11 , the optical substrate 206 may be disposed on the light exiting side of the third polarizing layer 205 .

As shown in FIG. 2(A), an embodiment of the present invention further provides a display panel including a first polarizing layer 201, a display substrate 202, a second polarizing layer 203, and a phase difference film 204. This embodiment takes the display substrate 202 as an OLED display substrate as an example. The first polarizing layer 201 is disposed on the light emitting side of the OLED display substrate 202, the second polarizing layer 203 is disposed on the light emitting side of the first polarizing layer 201, and the retardation film 204 is disposed on the light emitting side of the first polarizing layer 201. Between the light incident sides of the second polarizing layer 203.

In the field of display, the polarizing layer usually consists of a polarizer. Since the polarizer has a transmission axis, only incident light having a polarization direction parallel to the transmission axis direction is allowed to be emitted. Therefore, when the incident light passes through the polarizing layer, if the polarization direction of the incident light is parallel to the transmission axis direction of the polarizing layer, the incident light may be All pass through the polarizing layer; if the polarization direction of the incident light is perpendicular to the transmission axis direction of the polarizing layer, the incident light cannot pass through the polarizing layer; if the polarization direction of the incident light and the polarizing layer The direction of the transmission axis is at a certain angle, and part of the light component of the incident light can pass through the polarizing layer, and the polarization direction of the partial light component is parallel to the transmission axis direction of the polarizing layer. In addition, the polarizing layer also has good absorption, scattering and reflection characteristics, and can hide the incident light that cannot be transmitted by absorption, scattering, reflection, etc., to control the display effect of the image.

In this embodiment, the OLED display substrate has the advantages of self-illumination, high response speed, high color gamut, wide viewing angle, ultra-thin, low power consumption, and the like, and can be widely used in lighting, large-size televisions, flexible mobile phones, and the like.

Figure 12 illustrates a narrow viewing angle mode in accordance with one embodiment of the present invention. Referring to FIG. 12, the angle between the transmission axis direction of the first polarizing layer 201 and the horizontal direction is 90 degrees, the angle between the transmission axis direction of the second polarizing layer 203 and the horizontal direction is 0 degrees, and the phase difference film 204 is four. Take a wave plate as an example. When the light emitted from the OLED display substrate passes through the first polarizing layer 201, the natural light becomes the first linearly polarized light whose polarization direction is at an angle of 90 degrees with the horizontal direction, when the first After the linearly polarized light passes through the retardation film 204, a second polarized light whose polarization direction is at an angle with the horizontal direction is obtained. When the second polarized light passes through the second polarizing layer 203, the polarization direction of the second polarized light is The transmission axis directions of the two polarizing layers 203 are not parallel, and only the light component of the second polarized light whose polarization direction is parallel to the transmission axis direction of the second polarizing layer 203 can pass through the second polarizing layer 203, and the display operates in a narrow viewing angle mode. Only the user whose viewing angle is perpendicular to the display panel can view the content in the display panel.

Based on the display panel shown in FIG. 2(A), the display panel provided by the embodiment of the present invention may further include an optical substrate 206, which has the functions of protecting the display panel from damage, increasing the transmittance of incident light, and the like. The optical substrate 206 can be a touch panel or a protective glass. The optical substrate 206 is not specifically limited in the embodiment of the present invention. Referring to FIG. 13, the optical substrate 206 may be disposed on the light exiting side of the second polarizing layer 203. Referring to FIG. 14 , the optical substrate 206 may also be disposed between the light exiting side of the first polarizing layer 201 and the retardation film 204 .

The embodiment of the present invention further provides a display device, which includes a display panel, and the display panel may be the display panel shown in any of the above-mentioned FIGS. 2(A) to 6 and 9 to 14. In practical applications, the display device may be a device having a display screen, such as a smart phone, a tablet computer, or a smart TV.

It should be noted that, when the display panel provided by the foregoing embodiment is displayed, only the division of the above functional modules is illustrated. In actual applications, the functions may be allocated to different functional modules as needed, that is, The internal structure of the display panel is divided into different functional modules to perform all or part of the functions described above. In addition, the display panel embodiments provided in the above embodiments belong to the same concept, and are not described herein again.

A person skilled in the art can understand that all or part of the steps of implementing the above embodiments may be completed by hardware, or may be instructed by a program to execute related hardware, and the program may be stored in a computer readable storage medium. The storage mentioned above The quality can be read only memory, disk or optical disk, and the like.

The above is only a part of the embodiments of the present invention, and is not intended to limit the present invention. Any modifications, equivalents, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of the present invention. Inside.

Claims

A display panel includes: a first polarizing layer, a display substrate, a second polarizing layer, and a retardation film;

The first polarizing layer is disposed on one side of the display substrate, and the first polarizing layer is disposed between the second polarizing layer and the display substrate, and a transmission axis direction of the first polarizing layer is The transmission axis directions of the second polarizing layer are perpendicular to each other;

The retardation film is disposed between the first polarizing layer and the second polarizing layer.
The display panel according to claim 1, wherein the display substrate is a liquid crystal display substrate, and the display mode of the liquid crystal display substrate is an advanced super-dimensional field conversion ADS mode or a twisted nematic TN mode.
The display panel according to claim 2, further comprising a third polarizing layer;

The first polarizing layer is disposed on a light emitting side of the display substrate, and the second polarizing layer is disposed on a light emitting side of the first polarizing layer;

The third polarizing layer is disposed on a light incident side of the display substrate, and a transmission axis direction of the third polarizing layer and a transmission axis direction of the first polarizing layer are perpendicular to each other.
The display panel according to claim 2, further comprising a third polarizing layer;

The first polarizing layer is disposed on a light incident side of the display substrate, and the second polarizing layer is disposed on a light incident side of the first polarizing layer;

The third polarizing layer is disposed on a light emitting side of the display substrate, and a transmission axis direction of the third polarizing layer and a transmission axis direction of the first polarizing layer are perpendicular to each other.
The display panel according to claim 1, wherein the display substrate is an organic light emitting diode OLED display substrate.
The display panel according to claim 5, wherein the first polarizing layer is disposed on a light emitting side of the display substrate, and the second polarizing layer is disposed on a light emitting side of the first polarizing layer.
The display panel according to claim 3 or 6, further comprising an optical substrate;

The optical substrate is disposed on a light exiting side of the second polarizing layer or between a light emitting side of the first polarizing layer and the retardation film.
The display panel of claim 4, further comprising an optical substrate;

The optical substrate is disposed on a light exiting side of the third polarizing layer.
The display panel according to claim 7 or 8, wherein the optical substrate is Touch pad or protective glass.
The display panel according to claim 1, wherein the retardation film is a uniaxial retardation film.
The display panel according to claim 1, wherein the retardation film has a thickness of 90 nm to 320 nm.
A display device comprising the display panel according to any one of claims 1 to 11 above.